Heather has analyzed data from her study investigate the relationship between how long students spend studying per week and their mobile phone usage (in hours). She obtains a Pearson's r of 0.42. This finding implies that:
a. Studying time increases with mobile phone usage.
b. Studying time decreases with mobile phone usage.
c. In 12% of participants, an increase in studying time is associated with an increase in mobile phone usage.
d. In 12% of participants, an increase in studying time is associated with a decrease in mobile phone usage
Answer: a. Studying time increases with mobile phone usage.
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